Genus: A flattened ovoid or oblong, with longitudinal surface folds and
appearance of thickened 'pellicle'; hyaloplasm a crescent at anterior end with
thin extensions toward posterior end along sides; uninucleate (Page, 1976).
Thecamoeba sp. (sphaeronucleolus ?),
locomotive form 138 μm long,
a single contractile vauole posterior,
x 400, x 640, Saitama Pref., Japan, May-June 1999 by Y. Tsukii